Summer Set is an unincorporated community and census-designated place (CDP) in Jefferson County, Missouri, United States. It is in the southern part of the county, south of De Soto. It is a residential community built around three artificial lakes: Summerset Lake, Winterhaven Lake, and Spring Lake. As of the 2020 census, Summer Set had a population of 1,127.
Summer Set was first listed as a CDP prior to the 2020 census.